Of all the upgrades for diesel engines that we offer on this site, I believe changing over to Monark injector nozzles will give you more performance improvements for the money that any other single product. From our own diesels to the glowing reports we hear from our customers - you may have a hard time believing just how try this claim is until you experience it first hand! And Monark nozzles are probably the last of a breed. Yes, they are still manufactured in Germany...

